refactor(modules): extract castopod parts into a modules/ folder for a scalable HMVC structure

- create Admin, Analytics, Auth, Fediverse and Install modules in the root modules/ folder
- rename
ActivityPub to Fediverse

modules/Admin/Controllers/MyAccountController.php

@@ -0,0 +1,78 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright  2020 Podlibre
+ * @license    https://www.gnu.org/licenses/agpl-3.0.en.html AGPL3
+ * @link       https://castopod.org/
+ */
+
+namespace Modules\Admin\Controllers;
+
+use App\Models\UserModel;
+use CodeIgniter\HTTP\RedirectResponse;
+use Config\Services;
+
+class MyAccountController extends BaseController
+{
+    public function index(): string
+    {
+        return view('Modules\Admin\Views\my_account\view');
+    }
+
+    public function changePassword(): string
+    {
+        helper('form');
+
+        return view('Modules\Admin\Views\my_account\change_password');
+    }
+
+    public function attemptChange(): RedirectResponse
+    {
+        $auth = Services::authentication();
+        $userModel = new UserModel();
+
+        // Validate here first, since some things,
+        // like the password, can only be validated properly here.
+        $rules = [
+            'password' => 'required',
+            'new_password' => 'required|strong_password|differs[password]',
+        ];
+
+        if (! $this->validate($rules)) {
+            return redirect()
+                ->back()
+                ->withInput()
+                ->with('errors', $userModel->errors());
+        }
+
+        $credentials = [
+            'email' => user()
+                ->email,
+            'password' => $this->request->getPost('password'),
+        ];
+
+        if (! $auth->validate($credentials)) {
+            return redirect()
+                ->back()
+                ->withInput()
+                ->with('error', lang('MyAccount.messages.wrongPasswordError'));
+        }
+
+        user()
+            ->password = $this->request->getPost('new_password');
+
+        if (! $userModel->update(user_id(), user())) {
+            return redirect()
+                ->back()
+                ->withInput()
+                ->with('errors', $userModel->errors());
+        }
+
+        // Success!
+        return redirect()
+            ->back()
+            ->with('message', lang('MyAccount.messages.passwordChangeSuccess'));
+    }
+}